Growing a lemon trees from seed is surprisingly straight forward, and something that anyone can do if they have a warm, sunny windowsill. Getting the seed is probably the hardest part of the entire process. You can either buy on-line through a specialist supplier or, if you only want a few, collect and save the seed from shop-bought lemons.

Cut open the fruit, and once you have exposed the seeds, remove and wash off any remaining fruit residue. You should always clean seed collected from within fruiting bodies as they generally contain chemicals which actively prevent seed germination.

Place the ‘clean’ seed into a glass of water and discard any that immediately float to the surface as these will not be viable. Just be aware that smaller seed may rise as air bubbles form on the surface of the seed coat. If you have a variety of seed sizes you may also wish to discard any that look undersized as these are unlikely to have a large enough store of energy required for successful germination. Once you have selected your seed it can be dried off and stored in an envelope until required.

Lemon seed, like all citrus, have a natural dormancy period and so will require a period of cold temperature in order to initiate germination. Luckily, citrus fruits are usually pre-chilled as they are transported using a 'cool chain' system. If not, this can be overcome by placing the seed into the vegetable compartment of any household fridge and left for a few weeks. First, secure the seed into a paper towel by folding the towel it back on itself a couple of times, then place into a plastic bag or sterile food container before leaving it in the fridge.

It is possible to germinate lemon seed that has not experienced a cold period, but germination will usually be slower and not as successful.

After approximately three weeks - although they can be left in there for a month or so should they need to be – they can be removed from the fridge ready for potting on. Soak the seeds for a couple of hours or so before planting them into 2-3 inch pots. Only sow 1 seed per pot using a good quality, free draining soil based compost such as John Innes seed or No1, then water in.

If you can, place the pots into a heated propagator at a temperature of 16 degrees Celsius, otherwise transfer them to a warm, bright position such as a kitchen windowsill. Water periodically so that the compost doesn't dry out, but make sure that the compost is never left waterlogged either.

Germination should occur any time from 4 – 6 weeks, but don’t worry if it takes a little longer as lemon seeds have been known to take several months before they show.

The newly emerged seedlings can be left in their pots for a further 3 – 6 months depending on how they develop but once they get to about 4 or 5 inches they can be potted on to the next size pot using a John Innes ericaceous mix or No2 potting compost. So long as there are no frosts predicted the young lemon plants can be put out side to harden off over the next two to three weeks.

During the growing period they can be regularly watered and feed with a water soluble fertilizer once a week. You can often experiance yellowing of the leaves with lemons due to chlorosis, but this can be dealt with by feeding with an acidic plant food.

Tip out the seedling depending on whether you are growing your lemon plant as a bush, wall shrub or standard, or you can leave it alone, allowing it to take on its natural shape.

Although relatively hardy, keep your young lemon plant inside for its first winter. For subsequent winters it can be left or protected depending on the weather in you area.

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AnneS said...

I have 2 blood-orange trees grown from seeds poked into a pot a ocuple of years ago, They are now 29-30 inches tall. I am sure they need a new pot (or to be separated into 2 pots) but I need to know what kind of soil & pot to buy. Somewhere I read "ericacaeous soil"-- I live just west of Philadelphia, PA, so cannot leave them outafter mid-fall. HOw tall might they get?

Humera Hussain said...

Get a life Reuben !! Jeez crying over one picture

MCard said...

Humera... Something "owned" by somebody is exactly that! They own it... ridiculing Reuben for protecting his image (the picture not his self!) is just wrong.

Lynn Miller said...

Loved the blog!!
You mentioned:
'always clean seed collected from within fruiting bodies as they generally contain chemicals which actively prevent seed germination.' Just curious what these chemicals would be from? Pesticides? fertilizers? Please verify?